// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_
#define CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "content/public/browser/web_ui_message_handler.h"

namespace base {
class ListValue;
}

namespace content {
class MediaInternalsProxy;

// This class handles messages to and from MediaInternalsUI.
// It does all its work on the IO thread through the proxy below.
class MediaInternalsMessageHandler : public WebUIMessageHandler {
public:
    MediaInternalsMessageHandler();
    ~MediaInternalsMessageHandler() override;

    // WebUIMessageHandler implementation.
    void RegisterMessages() override;

    // Javascript message handlers.
    void OnGetEverything(const base::ListValue* list);

    // MediaInternals message handlers.
    void OnUpdate(const base::string16& update);

private:
    scoped_refptr<MediaInternalsProxy> proxy_;

    // Reflects whether the chrome://media-internals HTML+JS has finished loading.
    // If not, it's not safe to send JavaScript calls targeting the page yet.
    bool page_load_complete_;

    DISALLOW_COPY_AND_ASSIGN(MediaInternalsMessageHandler);
};

} // namespace content

#endif // CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_
